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H How to exchange fuses
Attention:
Ensure that only fuses of the type specified and the rated current intensity specified are
used for replacement. It is not allowed to use rewired fuses or to jumper the safety hol-
der.
For an exchange of fuses, always disconnect the power pack concerned from the mains because otherwi-
se there is a danger to life when live components are contacted. After disconnection from the mains, use a
suitable longitudinal-slot screw-driver to cautiously turn the safety cover (disposed above the mains input),
with the defective fuse, through abt. 45° in an anti-clockwise sense (bayonet catch). Remove the defective
fuse (20 mml ong, 5 mm thick) and replace it with another one of the same type and rated current intensity.
The fuses below are required:
3610: slow-action, 4 A, 250 V; common designation: T4/250V
3620: slow-action 8 A, 250 V; common designation: T8/250V
3635: slow-action 10 A, 250 V switch fuse
Now, cautiously turn the fuse holder including the new, intact fuse into the fuse holder again in a clockwise
sense (45°), applying a slight pressure. Do not put the power pack into service again until the casing is tight-
ly closed and screwed.
Troubleshooting
The power packs of the 36xx series which you acquired are products which were constructed according to
the latest state of the art and are safe in operation. However, problems or trouble may occur notwithstan-
ding this. The table below describes how you can remedy some of these malfunctions yourself in a relative-
ly easy manner. Do not fail to note the safety instructions.
Problem
No operation displayed
The current limit cannot be set
No voltage setting
Attention:
- When covers are opened or parts are removed live components may be exposed
except when it can be done by hand. Connection points may be under a voltage, too.
- Capacitors in the pack may still be charge even if the pack has been disconnected from
all voltage sources and measuring circuits.
Disposal
Dispose of the power pack, which has become unserviceable (and cannot be repaired), in conformity with
the current legal provisions.
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Possible remedy
Has the pack been connected to the mains?
Is the mains fuse defective?
Has the switch fuse been released? (for the 3636) ?
Has the "OUTPUT" switch not been pressed ?
Are the current limit setting knobs at their left-hand
stops ?
Safety instructions
In case of any damage that is caused due to inexpert handling or failure to observe the
safety instructions or operating instructions, we do not assume any liability. The guaran-
tee will expire in such a case.
•The power packs of the 36xx series left our works in a proper, safe technical condition. We kindly request
the user to follow the operating instructions and warning indications contained in these operating instruc-
tions to preserve this condition and to ensure safe operation
• The structure of the packs meets safety class 1. For your own safety, never disconnect or remove or inter-
rupt the protective conductor either in the pack or the mains cable. If the protective conductor is interrup-
ted there will be a danger to your life in a breakdown case if you contact the pack (voltage applied to the
casing).
• Take care not to damage or destroy the insulations of the packs, safety jacks, cables connected, and
mains cables.
• Do not use the power packs as a director indirect charging device. Moreover, the power pack is not pro-
tected from overloads and/or a permanent short-circuit at the exit.
• Keep power packs out of the reach of children.
• In commercial and industrial facilities, the regulations for the prevention of accidents as laid down by the
professional trade association for electrical equipment and devices need to be observed.
• Measuring devices used at schools, training facilities, do-it-yourself and hobby workshops should not be
handled unless supervised by trained, responsible personnel.
• Never turn on your power pack immediately after it has been brought from a cold into a warm room. Con-
densation water that forms might destroy your device under unfavourable conditions. Leave the device
switched off and wait until it has reached room temperature.
• Never wear metallic or conductive jewelry such as chains, bracelets, rings or the like when working with
power packs.
• Power packs are not allowed for use on human beings or animals.
• Voltages (> 35 V D.C.) which are hazardous when in a contact (and form a danger to life under unfavoura-
ble conditions) will be produced when the outputs of several power packs are connected in series. This
danger exists for the packs PPS 6515 and 12008 even if there is no series connection.
• Ventilation slots of power packs may never be covered. The packs are predominantly cooled by convec-
tion and forced ventilation (by a fan).
• Never operate unattended power packs and the consuming loads connected to them. Take actions apt to
protect and secure the consuming loads connected from the effects of the power packs (e.g. excess vol-
tages, failure of the power pack) and from the effects and dangers emanating from the connected loads
themselves (e.g. an inadmissibly high power input).
• In a malfunction case, power packs might deliver voltages exceeding 35 V direct current voltage, from
which hazards will result if the specified output voltages of the packs are lower.
• Only use tools explicitly allowed for the purpose when working under a voltage.
• Avoid installing bare metallic cable and contacts. Cover all of these points by appropriate insulating mate-
rials which are difficultly inflammable or take other measures to protect the points from being directly
contacted. Also, take measures apt to protect the electrically conductive components of the loads
connected from being directly contacted.
• If there is reason to believe that safe operation has become impossible put the pack out of operation and
secure it against any unintended operation. Safe operation must be presumed to be no longer possible, if
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